[Angioplasty with ductal stent: experience at Garrahan Hospital].

Objective: To describe and evaluate the outcomes of ductal angioplasty with stent placement at a single high-complexity center during the period 2016-2022.

Method: A retrospective descriptive cross-sectional study was conducted, including patients under 3 months of age who underwent ductal stent implantation as initial palliative treatment. Demographic, clinical, and anatomical data were collected before the intervention.

[Oral plasmablastic lymphoma in a human immunodeficiency virus positive child: a case report].

Plasmablastic lymphoma is a rare and aggressive subtype of diffuse large B cell non-Hodgkin lymphoma, originally described in the oral cavity of male adults with acquired immune deficiency syndrome. It is composed of neoplastic ceils which resemble immunoblasts but present immunophenotype distinctive of plasma cell and Epstein-Barr virus latent infection. In children, it is an even rarer disease.

[Bilateral thigh pyomyositis caused by community-acquired methicillin-resistant Staphylococcus aureus].

Primary pyomyositis is an acute bacterial infection of skeletal muscle leading to single or multiple abscess formation. The etiologic agent most frequently identified is Staphylococcus aureus, principal emerging pathogen of invasive musculoskeletal infections in otherwise healthy children. It is important to maintain a high level of suspicion, since early diagnosis and effective empirical treatment may prevent progression to a more severe disease.